Measuring method and measured results of vertical, longitudinal and lateral forces, which act on tires of a four-wheeel drive and four-wheel steering (4WD-4WS) agricultural tractor, are presented in this paper as well as those of longitudinal and lateral slip of the tires. These results were measured during steady-state circular turning, in which a fixed steering wheeel angle and a constant running speed were kept, on a paved road. The measurement was also done for a four-whell drive and two-wheel steering (4WD-2WS) state, disconnecting a rear steering link and fixing the steering angles of the rear tires of the 4WD-4WS tractor to zero. Through the analysis of the results, some turning characteristics of the 4WD-4WS tractor were obtained. A tight corner braking phenomenon was clearly found in the case of 2WS. The 4WS system supplied more effective turning than the 2WS system. Results from the computer simulation agreed well with the experimental results exept in the case of low speed turn and as to thrusts of tires.


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    Title :

    Measurement of forces acting on 4WD-4WS tractor tires during steady-state circular turning on a paved road


    Additional title:

    Die meßtechnische Bestimmung der Kräfte, die auf einen vierradgetriebenen und vierradgesteuerten Traktor beim stationären Wenden auf einer gepflasterten Straße einwirken


    Contributors:
    Itoh, H. (author) / Oida, A. (author) / Yamazaki, M. (author)

    Published in:

    Journal of Terramechanics ; 31 , 5 ; 285-312


    Publication date :

    1994


    Size :

    28 Seiten, 28 Bilder, 2 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English